Malik Ghallab is Directeur de Recherche Emeritus at CNRS and the University of Toulouse. He has (co-)authored more than 200 scientific publications and books on AI and robotics, especially on acting, planning, and learning. He is a EurAI Fellow, and Docteur Honoris Causa of Linköping University, Sweden. Dana Nau is Professor Emeritus at the University of Maryland in the Computer Science Department and the Institute for Systems Research. He has more than 400 refereed scientific publications, primarily on AI, game theory, and several interdisciplinary topics. He is an AAAI Fellow, ACM Fellow, and AAAS Fellow. Paolo Traverso is Director of Strategic Planning at Fondazione Bruno Kessler (FBK), Trento, Italy. His main research interests are in automated planning and learning under uncertainty. He is the author and co-author of more than 100 scientific articles. He is a EurAI Fellow, AAIA Fellow, and AIIA Fellow. Michela Milano, the author of the Foreword, is Professor at Università degli Studi, Bologna, Italy.